can XFCE iconbox on screen 2 show Applications of screen 1

In my Dual-Monitor-Setup, I just use 2 screens, no xinerama, no twinview.

Now I thought it would be cool to have only panels on screen 2, so that the full space of screen 1 is available!

Launchers are ok, I can just execute "DISPLAY=0.0 terminal" in example.But the iconbox (or tasklist)! I need a iconbox on a panel on screen 2, showing the applications of screen 1!

Is that somehow possible?

Looking at the tastlist-code, I believe the screen from which the windows are shown is set with "netk_tasklist_set_screen", correct?From where is this function called? Would it be possible to call it with the other screen?